A tool feeding mechanism for a valve body grinding machine

Abstract

This utility model relates to the field of valve manufacturing technology, specifically to a tool feeding mechanism for a valve body grinding machine, comprising: a swing arm with a clamp at one end for gripping a grinding disc; a support plate adapted to support the swing arm and rotatably connected to the other end of the swing arm; a displacement sensor connected to the support plate and connected to a controller, adapted to detect the displacement of the surface of the swing arm during rotation, the controller being adapted to stop the spindle operation upon receiving a displacement signal from the displacement sensor; and a guide rail extending along the feeding direction of the grinding disc, the support plate being slidably mounted on the guide rail. This application includes an early warning system for abnormal grinding disc displacement. When the grinding disc is lifted upwards, the swing arm rotates around the connection point with the support plate, thereby changing the distance between the swing arm and the displacement sensor. The displacement sensor can detect the displacement of the swing arm surface and thus issue an alarm.

Description

Technical Field

[0001] This utility model relates to the field of valve manufacturing technology, specifically to a tool feeding mechanism for a valve body grinding machine. Background Technology

[0002] Grinding machines are widely used in industry for high-precision applications such as grinding the metal sealing surfaces of valves during valve manufacturing.

[0003] Patent CN109746790B discloses a grinding system and method. In this system, after the valve body is fixed, the grinding machine's tool-feeding robot delivers the grinding disc to the desired position. The spindle, with the tension sleeve released, rapidly rises along the Z-axis. Once the spindle is in position, a pull rod pulls down to tighten the inner hole of the grinding disc. However, during this process, due to impurities, dirt, or abnormal positioning on the outer surface of the tension sleeve or the inner hole of the grinding disc, the tension sleeve often jams with the grinding disc, preventing smooth feed and causing the grinding disc to be lifted upwards. This can damage the tool-feeding fixture or even the rear guide rail slider or telescopic cylinder. The system lacks a warning mechanism for when the grinding disc is lifted and also lacks a protection mechanism for the rear guide rail slider or cylinder. Utility Model Content

[0004] In view of this, the present invention provides a tool feeding mechanism for a valve body grinding machine to solve the problem of lack of early warning and protection for the rear guide rail slider or cylinder in the prior art.

[0005] This utility model provides a tool feeding mechanism for a valve body grinding machine, including:

[0006] The swing arm has a clamp at one end for gripping the grinding disc;

[0007] A support plate is adapted to support the swing arm and is rotatably connected to the other end of the swing arm;

[0008] A displacement sensor is connected to the support plate and a controller, which is adapted to detect the displacement of the surface of the swing arm when it rotates. The controller is adapted to stop the operation of the spindle when it receives the displacement signal from the displacement sensor.

[0009] The guide rail extends along the feeding direction of the grinding disc, and the support plate is slidably mounted on the guide rail.

[0010] This application includes an early warning system for abnormal mill disc displacement. When the mill disc is lifted upwards, the swing arm rotates around its connection point with the support plate, thereby changing the distance between the swing arm and the displacement sensor. The displacement sensor detects the displacement on the surface of the swing arm and issues an alarm. The support plate is rotatably connected to the swing arm to prevent damage to the guide rail when the mill disc is lifted upwards. The support plate is slidably mounted on the guide rail, allowing for mill disc feeding via the guide rail.

[0011] In one alternative embodiment, the support plate includes:

[0012] The upper support plate and the lower support plate are provided. One end of the upper support plate is rotatably connected to the swing arm, and the connection point between the upper support plate and the swing arm is located above the lower support plate.

[0013] In this application, the upper support plate serves as the fulcrum for the swing arm's rotation, while the lower support plate provides foundation support. Their staggered arrangement creates a stable cantilever structure with the swing arm. When the grinding disc lifts the swing arm, the swing arm's rotational motion changes the distance between it and the displacement sensor, which can then be detected by the displacement sensor. Simultaneously, the lower support plate bears the main load.

[0014] In one alternative embodiment, the support plate is connected to a connecting structure, which has a slider that is slidably connected to the guide rail.

[0015] In this application, the connecting structure serves as an intermediary carrier to connect and assemble the support plate and the guide rail slider. The high-precision fit between the slider and the guide rail completely eliminates radial wobble during the movement of the support plate.

[0016] In one alternative embodiment, the guide rail is connected to a cylinder adapted to drive the connecting structure to slide on the guide rail.

[0017] In one optional embodiment, the cylinder is a rodless cylinder, and the moving end of the rodless cylinder is connected to the connecting structure.

[0018] In this application, the rodless cylinder eliminates the axial space occupied by the piston rod of a traditional cylinder, making the mechanism layout more compact, especially suitable for the narrow space of a grinding machine. Its magnetic coupling movement eliminates the risk of air leakage, and the rigid direct connection between the moving end and the connecting structure avoids the backlash problem of belt or gear drives, ensuring the accuracy of tool feeding and positioning.

[0019] In one optional embodiment, the upper surface of the lower support plate is provided with a groove, which is located below the connection point between the upper support plate and the swing arm.

[0020] In this application, the grinding disc is lifted upwards, and when the swing arm rotates, its lower end is embedded in the groove to prevent interference between the swing arm and the lower support plate.

[0021] In one alternative embodiment, the displacement sensor is connected to the connecting structure via a connecting plate, and the displacement sensor is located above the swing arm.

[0022] In this application, the connecting plate connects the displacement sensor to the plane of rotation of the swing arm. The vertical top-down layout can collect the displacement of the upper surface of the swing arm, which is less affected by environmental interference. The integrated fixation of the connecting plate and the connecting structure further eliminates sensor pose shift caused by vibration, ensuring the consistency of the detection data.

[0023] In one alternative embodiment, a spring is provided between the connecting plate and the swing arm.

[0024] In this application, under no-load conditions, the spring force keeps the swing arm pressed tightly against the support plate, preventing equipment vibration from generating false displacement signals. When the grinding disc is lifted, the deformation of the compressed spring is proportional to the lifting force, forming a buffer barrier to prevent the swing arm from causing instantaneous rigid impact on the sensor. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0027] Figure 2 This is a cross-sectional schematic diagram of an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Swing arm; 2. Grinding disc; 3. Displacement sensor; 4. Guide rail; 5. Upper support plate; 6. Lower support plate; 7. Connecting structure; 8. Rodless cylinder; 9. Groove; 10. Connecting plate; 11. Spring; 12. Slider; 13. Main shaft; 14. Valve body; 15. Expansion sleeve; 16. Tie rod. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] The following is combined Figures 1 to 2 The following describes embodiments of the present invention.

[0032] According to embodiments of the present invention, such as Figure 1 As shown, a tool feeding mechanism for a valve body grinding machine is provided, comprising:

[0033] The swing arm 1 has a clamp at one end for gripping the grinding disc 2;

[0034] A support plate is adapted to support the swing arm 1 and is rotatably connected to the other end of the swing arm 1;

[0035] The displacement sensor 3 is connected to the support plate and is connected to a controller. It is suitable for detecting the displacement of the surface of the swing arm 1 when it rotates. The controller is suitable for stopping the operation of the spindle 13 when it receives the displacement signal from the displacement sensor 3, so as to stop the spindle 13 from continuing to lift the grinding disc 2 and causing damage to the clamp and guide rail 4.

[0036] The guide rail 4 extends along the feeding direction of the grinding disc 2, and the support plate is slidably mounted on the guide rail 4. In this application, an early warning system for abnormal displacement of the grinding disc 2 is provided. When the tension sleeve 15 jams against the grinding disc 2, causing the grinding disc 2 to move upward, the grinding disc 2 is lifted upward, and the swing arm 1 rotates around its connection point with the support plate, thereby changing the distance between the swing arm 1 and the displacement sensor 3. The displacement sensor 3 can detect the displacement on the surface of the swing arm 1 and thus issue an alarm. The support plate is rotatably connected to the swing arm 1, preventing damage to the guide rail 4 when the grinding disc 2 is lifted upward. The support plate is slidably mounted on the guide rail 4, allowing feeding of the grinding disc 2 to be achieved through the guide rail 4.

[0037] In one alternative embodiment, the support plate includes:

[0038] An upper support plate 5 and a lower support plate 6 are provided. One end of the upper support plate 5 is rotatably connected to the swing arm 1, and the connection point between the upper support plate 5 and the swing arm 1 is located above the lower support plate 6. Both the upper support plate 5 and the lower support plate 6 can be connected to the connecting structure 7.

[0039] In this application, the upper support plate 5 serves as the rotation fulcrum of the swing arm 1, while the lower support plate 6 provides basic support. Their staggered arrangement allows them to form a stable cantilever structure with the swing arm 1. When the grinding disc 2 lifts the swing arm 1, the rotational motion of the swing arm 1 changes the distance between it and the displacement sensor 3, which can then be detected by the displacement sensor 3. Simultaneously, the lower support plate 6 bears the main load.

[0040] In one alternative embodiment, a connecting structure 7 is connected to the support plate, and the connecting structure 7 has a slider 12 that is slidably connected to the guide rail 4.

[0041] In this application, the connecting structure 7 serves as an intermediary carrier to connect and assemble the support plate and the slider 12 of the guide rail 4. The high-precision fit between the slider 12 and the guide rail 4 completely eliminates radial wobble during the movement of the support plate.

[0042] In one alternative embodiment, the guide rail 4 is connected to a cylinder adapted to drive the connecting structure 7 to slide on the guide rail 4. The cylinder may be connected to a controller.

[0043] In one optional embodiment, the cylinder is a rodless cylinder 8, and the moving end of the rodless cylinder 8 is connected to the connecting structure 7. The rodless cylinder 8 can push the connecting structure 7 to move along the extension direction of the guide rail 4.

[0044] In this application, the rodless cylinder 8 eliminates the axial space occupied by the piston rod of a traditional cylinder, making the mechanism layout more compact, especially suitable for the narrow space of a grinding machine. Its magnetic coupling movement eliminates the risk of air leakage, and the rigid direct connection between the moving end and the connecting structure 7 avoids the backlash problem of belt or gear transmission, ensuring the accuracy of tool feeding and positioning.

[0045] In one optional embodiment, the upper surface of the lower support plate 6 is provided with a groove 9, which is located below the connection point between the upper support plate 5 and the swing arm 1.

[0046] In this application, the grinding disc 2 is lifted upwards, and when the swing arm 1 rotates, its lower end is embedded in the groove 9 to prevent interference between the swing arm 1 and the lower support plate 6.

[0047] In one optional embodiment, the displacement sensor 3 is connected to the connection structure 7 via the connecting plate 10, and the displacement sensor 3 is located above the swing arm 1.

[0048] In this application, the connecting plate 10 connects the displacement sensor 3 to the plane of rotation of the swing arm 1. The vertical top-down layout can collect the displacement of the upper surface of the swing arm 1, which is less affected by environmental interference. The integrated fixation of the connecting plate 10 and the connecting structure 7 further eliminates sensor pose shift caused by vibration, ensuring the consistency of detection data.

[0049] In one optional embodiment, a spring 11 is provided between the connecting plate 10 and the swing arm 1. The spring 11 is offset from the groove 9 to prevent the spring 11 from pressing the swing arm 1 into the groove 9. The spring 11 can be a disc spring.

[0050] In this application, under no-load conditions, the spring 11 forces the swing arm 1 to press tightly against the support plate, preventing equipment vibration from generating false displacement signals. When the grinding disc 2 is lifted, the deformation of the spring 11 is proportional to the lifting force, forming a buffer barrier to prevent the swing arm 1 from causing instantaneous rigid impact on the sensor.

[0051] In this application, after the valve body 14 moves to the grinding position, the grinding disc 2 is mounted on the clamp of the swing arm 1. A robotic arm for loading and unloading the grinding disc 2 is propelled forward along the flange channel of the valve body 14 via the guide rail 4 and the rodless cylinder 8. The spindle 13 is connected to a transmission mechanism, which allows the spindle 13 to move along the flow channel of the valve body 14. The transmission mechanism is connected to a controller. An expansion sleeve 15 is provided at the end of the spindle 13. A pull rod 16 that can move up and down is provided inside the spindle 13. By pulling the expansion sleeve 15 with the pull rod 16, the grinding disc 2 can be tightened or loosened. With the expansion sleeve 15 released, the main shaft 13 rises rapidly along the flow channel of the valve body 14. After the main shaft 13 reaches its position, the pull rod 16 is pulled down, allowing the expansion sleeve 15 to expand and tighten the inner hole of the grinding disc 2. The clamp releases the grinding disc 2 and then quickly retracts to its initial position via the rodless cylinder 8 at the rear end. Subsequently, the system begins cooling, and the main shaft 13 rotates and moves downward to grind the sealing surface of the valve body 14. During this process, if the outer surface of the expansion sleeve 15 or the inner hole of the grinding disc 2 is too dirty or its position is abnormal, the expansion sleeve 15 may become stuck with the grinding disc 2, preventing smooth insertion and thus pushing the grinding disc 2 upward. This causes the swing arm 1 to rotate clockwise, such as... Figure 2 As shown, displacement sensor 3 detects the displacement of the surface of swing arm 1, triggers the displacement sensor 3 signal, and transmits the displacement signal to the controller. The controller can control the transmission mechanism to stop the main shaft 13 from rising and issue an alarm at the same time.

[0052] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A tool feeding mechanism for a valve body grinding machine, characterized in that, include: The swing arm (1) has a clamp at one end for gripping the grinding disc (2); A support plate is adapted to support the swing arm (1) and is rotatably connected to the other end of the swing arm (1); A displacement sensor (3) is connected to the support plate and is connected to a controller, which is adapted to detect the displacement of the surface of the swing arm (1) when it rotates. The controller is adapted to stop the operation of the spindle (13) when it receives the displacement signal from the displacement sensor (3). The guide rail (4) extends along the feeding direction of the grinding disc (2), and the support plate is slidably disposed on the guide rail (4).

2. The tool feeding mechanism for a valve body grinding machine according to claim 1, characterized in that, The support plate includes: The upper support plate (5) and the lower support plate (6) are provided. One end of the upper support plate (5) is rotatably connected to the swing arm (1), and the connection point between the upper support plate (5) and the swing arm (1) is located above the lower support plate (6).

3. The tool feeding mechanism for a valve body grinding machine according to claim 1, characterized in that, The support plate is connected to a connecting structure (7), and the connecting structure (7) has a slider (12) that is slidably connected to the guide rail (4).

4. The tool feeding mechanism for a valve body grinding machine according to claim 3, characterized in that, The guide rail (4) is connected to a cylinder, which is adapted to drive the connecting structure (7) to slide on the guide rail (4).

5. The tool feeding mechanism for a valve body grinding machine according to claim 4, characterized in that, The cylinder is a rodless cylinder (8), and the moving end of the rodless cylinder (8) is connected to the connecting structure (7).

6. The tool feeding mechanism for a valve body grinding machine according to claim 2, characterized in that, The upper surface of the lower support plate (6) is provided with a groove (9), which is located below the connection point between the upper support plate (5) and the swing arm (1).

7. The tool feeding mechanism for a valve body grinding machine according to claim 3, characterized in that, The displacement sensor (3) is connected to the connection structure (7) through the connecting plate (10), and the displacement sensor (3) is located above the swing arm (1).

8. The tool feeding mechanism for a valve body grinding machine according to claim 7, characterized in that, A spring (11) is provided between the connecting plate (10) and the swing arm (1).

Images